tests/ui/unsized-locals/unsized-exprs-rpass.rs

   1 // run-pass
   2 #![allow(incomplete_features, unused_braces, unused_parens)]
   3 #![feature(unsized_tuple_coercion, unsized_locals, unsized_fn_params)]
   4
   5 struct A<X: ?Sized>(#[allow(unused_tuple_struct_fields)] X);
   6
   7 fn udrop<T: ?Sized>(_x: T) {}
   8 fn foo() -> Box<[u8]> {
   9     Box::new(*b"foo")
  10 }
  11 fn tfoo() -> Box<(i32, [u8])> {
  12     Box::new((42, *b"foo"))
  13 }
  14 fn afoo() -> Box<A<[u8]>> {
  15     Box::new(A(*b"foo"))
  16 }
  17
  18 impl std::ops::Add<i32> for A<[u8]> {
  19     type Output = ();
  20     fn add(self, _rhs: i32) -> Self::Output {}
  21 }
  22
  23 fn main() {
  24     udrop::<[u8]>(loop {
  25         break *foo();
  26     });
  27     udrop::<[u8]>(if true { *foo() } else { *foo() });
  28     udrop::<[u8]>({ *foo() });
  29     udrop::<[u8]>((*foo()));
  30     udrop::<[u8]>((*tfoo()).1);
  31     *afoo() + 42;
  32     udrop as fn([u8]);
  33 }